[Zope] can supress +/- sign in dtml-tree?

[Tom Germaine]

<color><param>0100,0100,0100</param>Hello All,


I want to display a dtml-tree always expanded, with no controls visible for 
contracting (basically, an indented list of links). I set the tree to always expand 
via the following: 

<<dtml-call "REQUEST.set('expand_all',_.int(1))"> 

  <<dtml-tree avc branches_expr="objectValues(['Folder','DTML Document'])"   
sort=id> ..........


But I don't want the minus signs to appear.  This question was asked to the 
group previously, but could not locate an answer.   Does anyone know how to 
do it?


Tom Germaine